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JDHN H. RANDALL AND CHARLES n. RANDALL, or BOSTON, MASSACHUSETTS LaimPanam. "82,874, dated caoba c, 186s,

IMPROVEMENT IN STEAM-ENGINE GOVERNORS.

TO ALLWHOM IT MAY CONCERN: Y

Be it known that we, JOHN H. RANDALL and CHARLES E. RANDALL, both of'Boston, in the county of Suffolk, and State of Massachusetts, haveinvented a new and improved Hydraulic Regulator for Steam-Engines,Water-Wheeis, &c., of which the following is aV full, clear, and exactdescription, reference being had to the accompanying drawing, makinga'part of this specification, and representing a vertical longitudinalsection of the regulator. A A

The object of our invention is to produce a simple, inexpensive, andefficient regulator for steam-engines, water-wheels, dto., but which ismore particularly adapted for marine engines.

' Another object is to simplify the transmission of motion, so as tooperate the regulator directly from the main moving parts ofthe engine,without interpositon of pulleys, belts, gears, and shaftings.

And our nventionconsists in the employment bf fluids for operating thethrottle-valve, cut-oi, or'shut, and

for regulating the speed of engines or other motors by means ofraisingthe fluid from a tank by a double-acting force-pump, andconnecting the delivery-pipe with a second cylinder, which is providedwith a piston and pistonrod, the latter being attached to the lever of athrottle-valve.

A waste-pipe is attached to the second cylinder, at a point below thelowest position'of the piston, for the purpose of discharging the duid,through a cock, back into the tank orreservoir.

My invention consists, further, in the arrangement cfa cock with thewaste-pipe, at s uch point between the cylinder and the tank, for thepurpose of increasing'ior decreasing the flow of the uid through thesame; the cock being provided with a handle, to bel operated accordingto the option of the attendant.

Referring to the drawings, a represents a plate or part ofthe frame-ofthe engine, to which is attached the pump-cylinder Zz, which is providediwith the piston c and piston-rod d d, extending through the heads ofthe cylinder, and which may be attached by an arm, directly to thepiston-rod of a steam-engine, and thus give the piston of the pump thefull stroke of the engine, or it may be attached to an eccentric on themain shaft,and then give the piston any desired length of stroke. i g

To the lower portion of the pump-cylinder b, and near its heads, areattached the receiving-valvese e and pipesff. The endf extends into atank or reservoir iilled'with Huid.

At the upper portion ofthe pump-cylinder b, and opposite to thereceiving-valves e e, are "placed the delivery-valves g'g, connecting,by means ofthe delivery-pipes 7th L, the cylinder b with the secondcylinder z', which latter is provided with the piston ,7c and piston-rodc, and communicates motion, by means of lever` l, to the throttle-valvem. l

To the lower portion of the cylinder'i is attached the waste-pipe n,with the cock p, and'which conducts the iluid'back into the tank.

rllhe operation of this regulator is as follows i The action ofthe pump,when the engine is in motion, forces the iluid constantly up into thesecond cylinder z', and also into the Waste-.pipe n, which latter isprovided with the cock p. The latter is-opened so far only as to allow aquantity of iiuid toA pass through, and which has been previously raisedby the pump at a certain speed of the engine, but as soon as this speedincreases, more'uid will be forced into the cylinder z' than can readilyescape through the cockp, and consequently the piston k in said cylinderwill be raised, operating onthe lever Z, and closingl thethrottle-valve, until thespeed of the engine is thus reduced to thedesired velocity.

, To increase the speed of the engine, it is simply required to turn thecock p, so as to increase the opening through it, and thus facilitatethe flow ofthe Huid, and 'uz'ce versa.

' Thus it will be seen that any-sudden change inthe speed, as on marineengines, produces immediately the required setting ofthethrottle-vnlve'orv cut-off, without danger of slipping belts or breakingcogs. p

The iluid used may be water, alcohol, oils', air, mercury, or any othersuitable substance, as the ui'd is used over and over again.

To secure an even and exact working of the regulator, the parts shouldbe so arranged as t0 raise equal quantities through the receiving anddelivery-valves respectively, and, when' ths properly proportioned, thepiston 7c will be at rest until a change in speed of the engine occurs.

What we claim as our invention', end desire to secure by Letters Patent,is-' 1. The combination of the double-acting force-pump with the pipeh", cylinder i, and with the throttlevalve m and waste-pipe n, as hereinspecified.

2. The arrangement of the cock p with the waste-pipe h, cylinder z',pipe 71,", and double-acting force-pump,

substantially as herein set forth.

In testimony whereof, we have signed our names to this specification inthe presence of two subscribing witnesses.

' J. H. RANDALL, C. E. RANDALL.

Witnesses:

J. H. CorrERnAeEN, J.V H. ADAMS.

